I just took My 2008 cm to the dealer today because it was shifting into 4 5 6th gears with the torque converter locked up. then it went into limp mode and wouldn't shift out of 3rd. I had 4 lights blinking at me at once. the tech told me it's a solenoid in the valve body but he had to check with a regional rep first. they might also change the torque converter while there down there. I hope I just get a whole new tranny..
